Syslog 0
Emergency - The system has become unstable
Syslog 1
Alert - A condition should be corrected immediately
Syslog 2
Critical - A failure in the system’s primary application requires immediate attention
Syslog 3
Error - Something is preventing proper system function
Syslog 4
Warning - An error will occur if action is not taken soon
Syslog 5
Notice - The events are unusual
Syslog 6
Information - Normal operation message that requires no action
Syslog 7
Debugging - Useful information to debuggers